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Date: Tue, 05 Mar 2013 23:51:40 +0200
From: Eli Zaretskii <eliz AT gnu DOT org>
Subject: Re: Printing sign of NaN.
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> Date: Tue, 05 Mar 2013 20:47:25 +0100
> From: Juan Manuel Guerrero <juan DOT guerrero AT gmx DOT de>
> 
> ONFY while I was testing trunc() I noted that printf did not print the
> sign of NaN.  The committed small patch  below fixes the issue.

Isn't NaN always negative?  Do you succeed in printing both negative
and positive NaN with this patch?

Apologies if my failing memory just failed me again.